Heat exchange unit



Dec. 26, 1939. H. HEMMING ,837

HEAT EXCHANGE UNIT Filed June 9, 1958 2 Sheets-Sheet 1 Dec. 26,1939. H.HEMMING 5 337 HEAT EXCHANGE UNIT Filed June 9, 1 938 2 Sheets-Sheet 2fig. 3.-

000- I 0000 D00 09g: 6'

jzwanfiow HHBOLD HEMM/Ne 0 I Patented Dec. 26, 1939 PATENT 2,184,837HEAT EXCHANGE UNIT Harold Hamming, Dedham, Mass., asslgnor to B. F.Sturtevant Company, Hyde Park, Boston, Mass.

Application June 9, 1938, Serial No. 212,728

4Claims.

This invention relates to heat exchange units and relates moreparticularly to condenser units for use with refrigeration apparatus.

It is highly desirable to provide refrigeration apparatus for quietoperation for use in comfort air conditioning such, for example, as theconditioning of air for railway passenger cars. It has,

been decided that it is desirable to divide the refrigeration apparatusinto three separate units, viz., a compressor unit, an evaporator unit,and

a condenser unit. The present invention is directed to the provision ofa quiet operating condenser unit.

In one embodiment of the invention, the condenser coils are arranged intwo spaced-longitudinal rows with fans at each end which move the airover the coils.

One feature of the invention resides in the provision of what are termed"air splitter sheets" located midway between the fans and which not onlyturn the air through the unit at right angles, but separate theairstreams from the two fans, and add strength at the center of the unitthus enabling a lighter frame for the unit to be used. An object of theinvention is to provide a relatively quiet Ian andcoil unit.

Another object of the invention is to provide an efllcient, mechanicallystrong and light weight fan and coil unit. 7 Another and more definiteobject of the invention is to provide a relatively quiet; refrigerantcondenser unit.'

Other objects of the invention will be apparent from the followingdescription taken with the drawings.

The invention will now be explained with reference to the drawings, ofwhich:

v Fig. 1 is a plan view insection along the lines l-l of Fig. 2, lookingdownward upon one embodiment otthe invention;

Fig. 2 is a sectional view along the lines 2-2 0! F 8.

Fig; 3 isan end view oi the unit;

Fig. 4 is a sectional view along the lines 4-4 of Fig. 2, and

- Fig. 5 is an enlarged view showing the details of the support of theair splitter sheets.

Arranged on opposite vertical sides of the unit are the condenser coils6 which are supported in the vertical angles 1. The vertical end angles8 are attached as by welding to the angles I and the inlet rings 2 ofthe fans 10 are attached by the members H and I2 tothe angles I and tothe horizontal end angles II. 5 The longitudinal angles I 6 are attachedto the vertical angles 1 at opposite ends of the unit. The smallerlongitudinal angles I! are attached to the angles l6 and to the upperand lower frame sheets l8 which are also attached to the horizontal endangles l5.

The horizontal, sound insulating blocks iii are attached to the top andbottom sheets l8 and the motors 20 are supported upon the lower blockis, through the intermediary of the pedestal block 30 and thetransverse'angles 2|. m

In the center of the unit are arranged the four splitter sheets 22.These extend from top to bottom of the interior of the unit as shownmost clearly by Figs. 2 and 4 of the drawings and looking at them fromabove or below or in hori- 1g zontal section they are substantially starshaped in sectional outline as shown most clearly by Fig.

1. They form a cellular strengthening and supporting structure at thecenter of the unit and also segregate and provide stream-line flow forthe air from the oppositely placed fans I 0.

' The two fans ID are provided in order that the fan speed and resultingnoise canbe reduced. The splitter sheets 22 turn the air from each fallin two opposite directions-in streamline flow and as at the same-timeseparate the air stream produced by the separate fans, thus providingmore emcient and less noisy operation.

The splitter sheets 22 are attached to the upper and lower insulatingblocks l9 by being attached as by welding to the vertical sides of theclips 23 with the horizontal sides of the clips-being attached to theblocks It by the bolts 24.

The unit is seen to have as its two vertical longitudinal sides, thecoils 6 and to have as its upper 35 and lower horizontal sides, thesheets it to which the insulating blocks l9 are attached. The fans IIIare mounted in the two ends of the unit and are provided for efliciencyand quietness with the rings]. The screen guards 25 are provided at wthe exterior oi the fans.

While the fans have been illustrated as blowing the air through thecoils, they could be designed and rotated according to this invention todraw the air through the coils.

While one embodiment of the invention has been explained for the purposeof illustration, it should be understood that other apparatus andarrangement of apparatus may be utilized by those skilled in the artwithout departing from; the spirit 0! the invention.

What is claimed is:

1. A condenser unit comprising a rectangular casing including twocontinuous, oppositely disposed walls, and two apertured walls formed byll rows of condenser tubes, and having open ends, fans in said ends formoving air over said tubes, and means between said fans extendingcrosswise the passage between said walls and connecting said continuouswalls for strengthening said unit at its center and for turning the airmoved by each fan, in opposite directions so that the air moved by eachtan is directed over both of said rows of tubes.

2. A condenser unit comprising a rectangular casing including twocontinuous, oppositely disposed walls, and two apertured walls formed byrows of condenser tubes, and having open ends, fans in said ends formoving air over said tubes, and means comprising two pairs of curvedplates extending between said fans crosswise the space between saidcontinuous walls and forming a cellular support connecting saidcontinuous walls and shaped for turning the air moved by each Ian,in'opposite directions so that the air moved by each fan is directedover both of said rows of tubes.

3. A condenser unit comprising a rectangular casing including twocontinuous, oppositely disposed walls, and two apertured walls formed byrows of condenser tubes, and having open ends,

fans in said ends for moving air over said tubes, and means forstrengthening said unit at its center and for turning the air moved bysaid fans, comprising two pairs of curved sheets extending between saidfans crosswise the span between and connecting said continuous walls andconverging towards said fans at points midway between said aperturedwalls and converging towards said apertured walls at points between saidfans.

4. A condenser unit comprising a rectangular casing including tworelatively long, continuous, oppositely disposed, horizontal walls, andtwo relatively long, oppositely disposed apertured vertical walls formedby horizontal rows of condenser tubes, and having open ends, fans insaid ends for moving air over said tubes, and means for strengtheningsaid unit at its longitudinal center comprising two pairs of curvedsheets connecting said continuous walls between said fans and convergingtowards said fans and towards said apertured walls along vertical lines,said sheets having horizontal upper and lower edges contacting saidhorizontal walls and forming a cellular bracing structure.

HAROLD HEMMIIING.

